US EditionRevolutionary Tracking Study Follows Monarch Butterflies from Canada to Mexico : Indybay
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Scientists can track individual butterflies with tiny sensors
Monarch butterflies somehow fly from Ontario, Canada to Mexico City, but the migration patterns were unknown. A small sensor to tag individual butterflies might provide the answers. Dan Fagin, with graphics by Jonathan Corum, reports for the New York Times on the rice-sized, solar-powered radio tag. Tags: butterflies, location, migration, New York Times, tracking
The first monarch butterflies that completed the epic journey of more than 4,000 kilometers from Canada and the United States began to arrive in Mexico between the end of October and the beginning of November 2025. The massive arrival to the oyamel forests in the Mariposa Monarca Biosphere Reserve (between Michoacán and the State of Mexico) was recorded mainly from the second week of November. It is expected that the greatest concentration of sp…
Revolutionary Tracking Study Follows Monarch Butterflies from Canada to Mexico : Indybay
PORTLAND, Ore.; November 17, 2025 — In the most comprehensive tracking study of monarch butterfly migration ever conducted, a collaboration of over 20 research and conservation organizations across four countries has successfully tracked individual monarchs over thousands of miles. The butterflies were followed from locations throughout North America and the Caribbean to their overwintering sites in Mexico using revolutionary ultralight transmit…
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